17 and 61
61 is a prime number. 49 is not a prime number as it is divisible by 7. 51 is not a prime number as it is divisible by 3.
ANSWER: 61 is a prime number but 51 is a composite number.61 is a prime number because the factors of 61 are 1 and itself (61).51 is a composite number because the factors of 51 other 1 and itself (51) are 3 and 17.
61 and 71 are prime numbers the rest are composite numbers
The prime numbers in the range 51 - 70 are 53, 59, 61 and 67.
3 x 17 = 51. It has factors other than 1 and itself. It is composite. 61 is prime. Its only factors are 1 and 61. 71 is prime. Its only factors are 1 and 71. 7 x 13 = 91. It is a composite number.
37 = prime 47 = prime 51 = 17 x3 61 = prime
The prime numbers between 51 and 80 are: 53, 59, 61, 67, 71, 73 and 79
51 composite, 61 prime.
33 = 3 x 11 51 = 3 x 17 41 prime 61 prime
51 is a composite number but 61 is a prime number
A composite number is a positive integer greater than 1 that has more than two distinct positive divisors. In this case, the number 51 is a composite number because it has divisors other than 1 and itself, such as 3 and 17. Numbers 31, 41, and 61 are all prime numbers, as they only have two distinct positive divisors, 1 and the number itself.
The prime numbers from 51 to 100 are: 53, 59, 61, 67, 71, 73, 79, 83, 89, 97